Auditing Exchange Mailbox size, logon and logoff.

The Exchange Systems Manager can be used to quickly determine basic auditing information for all mailboxes configured on the server.

Open Exchange System Manager

Go to Administrative Groups – First Administrative Group – Servers – Server_Name – First Storage Group – Mailbox Store – Mailboxes.

This will display all the mailboxes, you can determine the current size of each mailboxes. This screen also provides a quick way to determine basic security auditing information such as, last logon by, logon time and logoff time.